1924] Swarth: Birds and Mammals of the Skeena Biver Region 321 



There are, it is true, a number of birds found at sea level on the 

 coast and in the lowlands of the Hazelton region, represented either 

 by the same species or subspecies in both places, or by closely related 

 subspecies, but these are mostly wide-ranging forms, not closely con- 

 fined within any particular zone. Some such species are : 



Ceryle a. eaurina Melospiza 1. lincolni 



Spiuus p. pinus Hinindo erythrogaster 



Melospiza m. morphna Planestious m. migiatorius 



There are eighteen such eases. 



Turning now to conditions at high altitudes, we find the following 



birds in summer at timber line (Hudsonian Zone) on Nine-mile 



Mountain : 



Dendragapus o. flemingi Nanuus h. pacificus 



Canachites franklini Certhia f. occidentalis 



Perisoreus e. canadensis Sitta canadensis 



Loxia leucoptera Penthestes g. abbreviatus 



Zonotrichia coronata Penthestes h. columbianus 



Passerella i. annectens Kegulus s. olivaceus 



Dendroica townsendi Eegulus t-. calendula 



Wilsonia p. pileolata Hyloeichla g. guttata 



Ixoreus u. naevius 



Of these seventeen species, just four {Perisoreus c. canadensis, 

 Zonotrichia coronata, Penthestes g. abireviatus, and Penthestes h. 

 columbianus) are not found upon the coast. The others, represented 

 either by the same species or by closely related complementary sub- 

 species, are mostly common and characteristic birds of the forests at 

 sea level in the coastal region. In general, the avifauna at sea level 

 on the coast is thus seen to be closely similar to that found just below 

 timber line (4.500 feet altitude), two hundred miles inland. 



It is of interest to note that muskeg surroundings in the valleys 

 of the upper Skeena region produced certain birds usually found in 

 the Hudsonian Zone. Occasional pairs, at wide intervals, were thus 

 noted of the following species : 



Picoides arcticus Eegulus s. olivaceus 



Piooides a. fasciatus Eegulus c. calendula 



Sitta canadensis Ixoreus n. naevius 



On the treeless summit of Nine-mile Mountain the following birds 



were found breeding : 



Lagopus 1. alexandrae Leucostiete t. littoralis 



Lagopus rupestris Passereulus s. alaudinus 



Lagopus 1. leucurus Anthus rubeseens 

 Otocoris a. arcticola 



